Dyeing mixed textile goods made



Patented Dec. 17, 1929 UNITED STATES PATENT OFFICE.

HERMANN WAGNER, OE SODEN-ON-THE-TAUNUS, A ND HEINZ EIGHWEDE AND ERICHFISCHER, OF HOCHST-ON-THE-MAIN, GERMANY, ASSIGNORS TO GENERAL ANILINEWORKS, INC., OFINEW YORK, N. Y., A CORPORATION OF DELAWARE DYEING MIXEDTEXTILE GOODS MADE OF WOOL AND SILK FIBERS No Drawing. Application-filedMarch 17, 1927, Serial No. 176,298, and in Germany March 22, 1926.

As is known only a few acid azo dyestuffs possess the property of dyeingevenly wool and silk fibers in a single bath. In U. S.

Patent 1,678,611, it has been set forth that such pyrazolone azodyestuffs as contain one or more carboxylic'acid ester groups are disglpguished by an increased afiinity for the silk Now we have found thatpyrazolone-azo 1n .dyestufl's containing one or more of the ether oreonigroupsa'lkyloxy-,' aryloxyand aralkyl-' oxyare also eminently suitablefor producing very even tints on mixed textile goods made of wool andsilk fibers.

In the following examples the mark signifies that-the amino bodystanding before the arrow is diazotiz'ed and coupled with the componentstanding in the direction of the arrow. These examples serve toillustrate our invention but the 'are not intended to limit it; theparts are y'weight:

(1) 1 kg. of a fabric of mixed wool and silk fibers is dyed in anappropriate manner in a dyebath containing 20g. of the dyestuif:

ortho-aminoani'sole 1- (4 -sulfophenyl) -3- methyl-5-pyrazolone, whileadding 10% of sodium sulfate and 4% of sulfuric acid. The dyeing thusobtained is not only remarkable for its great general fastness but alsofor the fact that the wool fibersas well as the silk fibers are dyedevenly and one and the same shade. The dyestufi' has the followingconstitution:

there is obtained the same result as in Exam- The combinations specifiedin the forego ing examples may be largely varied both as regards thediazotizin'g component and the coupllngcomponent. I t is, however,advantageous to prepare the dyestuif in such a manner that its moleculedoes not contain more acid groups than are necessary for rendering thedyestuff soluble.

Besides the dyestuffs used in Examples 1 and 2 there may alsoadvantageously be used the following dyestuffs:

S-amirio-l-methyl 4 phenylbenzylether-a l-(t'-sr1lfopl1enyl)-3-methyl-5-pyrazol0ne of the following constitution:

CHa

Ortho-aniline-sulfonic acid- 1- (4-methoxyphenyl)-3-n1etl'1yl-5-pyrazalone of the following constitution: 7

son oH-c= a a /N O-OCHs =N=N H-CO Para Jaminocliphenylether-orthosulfonic acid- 1-phenyl-3-methyl-5-pyrazo1one of the oH,-=N OON=N eH COfollowing constitution:

or the like.

SOIH

The dyestufi's. are prepared in known manner by causing the diazocompounds to act upon the pyrazolones obtainable from the correspondinghydrazines and acetoacetic ester.

The afiinity of the dyestuffs for the silk fiber is enhanced if both thediazo component and the coupling component contain one or more of theether groupscon'sisting of alkyloxy-, aryloxyand aral-kyloxy-or if oneof the components contains an ether group and the other a carboxylicacid ester group. Besides the above-cited monoazo dyestuffs there mayalso advantageously be used disazo dyestuffs obtained in a suitablemixed textile goods made of wool an 40 fibers with a pyrazolone-azodyestuflI' con--.

manner by synthesis. c

In the appended claims the term ether group is to be understood asincluding alkyloxy,; aryloxy and aralkyloxy groups.

We clalm: "1. The process which comprises dyeing mixed textile goodsmade of wool and silk fibers with a pyrazolone-azo dyestufi containingboth in its diazo component and in its coupling component several ethergroups.

2. The process which comprises dyeing 9. As :new products, mixed wooland silk textile oods dyed with a pyrazolone-azodyestu of thefollowingformula:

textile goods dyed with a pyrazolone-azodyestufl of the followingformula:

' ONZZiEZEQ Q 11. As new products, mixed wool and silk textile goodsdyed with the pyrazolone-azodyestuif of the following formula:

mixed textile goods made of wool and silk fibers with a'pyrazolone-azodyestufl' containing' in one of its two components several ether groups.

3. The process which comprises d eing silk taining both in its diazocomponent and in its coupling component an ether group.

4. The process which comprises dyeing mixed textile goods made of wooland silk fibers with a pyrazolone-azo dyestufi containing in one. of itstwo components an ether group. p

5. As new products, mixed wool and silk textile goods dyed with awater-soluble pyrazolone-azo dyestufl' containing both in.

its diazo component and inits coupling componentseveral ether groups.

6.'As new products, mixed wool and silk textile goods dyed with awater-soluble pyrazolone-azo dyestuff containing in one of its twocomponents several ethen groups.

7. As ne w products nixed 'WOOIjaDd silk textile goods dyed with awater-soluble pyrazolone-azo dyestuff containing both in its diazocomponent,and in its coupling component an ether group.

' In testimony tures.

HERMANN WAGNER. HEINZ EICHWED-E. ERICH FISCHER.

8. As new products, mixed wool and silk textile goods dyed with awater-soluble. pyrazolone-azo dyestuflt' containing in one of its twocomponents an other group.

' whereof, we afiix our signa-

